Throat-plate for sewing-machines.



J. BERGER, JR. THROAT PLATE FOR SEWING MACHINES.

APPLICATION FILED DEC- 30, 1916.

UT F 1 o 5 J a, a Z. I]

awuenlloz attoznm u J. BERGER, JR. THROAT PLATE FOR SEWING MACHINES.

APPLICATION FILED DEC- 30, I916.

Patented Nov. 5

2 SHEETSSHEET 2.

m: NORRIS Psrzk: co, rnalaunln.rasnmc|ml. n c

' sir-Arne i rosiirn,n,nnenn,.,zin., (mama, NEW YORK, passrqnon 'ro umgnspnernr MACHlNE COMPANY, on QHICALQOJILLILIOIS, Ai: Q.B' E BiATLQN- QE LLINDI-:

To all whom it may concern:

4% it'lmown that I, JosErrr BnRenn, J r., a citizen of the United States, residing at Utiea, i ithe county of" Oneida, State of New York, have invented certain new; and

useful==lmprovements i-n Throat-Plates for Sewing-Machines,- of" which the following is a description, reference being had to the accompanying; drawing and to the figures of reterence marked thereon.

The invention relates to new and useful improvements in throat plates for sewing machines, and more particularly to a throat plate for a multiple needle stitching mechanism which is adapted to unite overlapped edges of fabric sections and cover the trimmed edges of the fabric sections.

I object of the invention is to providea throat plate which is formed with means for guiding fabric sections with their edge portions upturned for trimming, and means 3. t Z with the; throat. plate;

cotiperating' with the presser foot over lappingthe edges after they are trimmed andbefore they cross theneedle openings in; the throat plate, so that'the trimmed edges ma beoverlap'ped' and covered and joined by'the stitching mechanism.

Inthe'drawi'ngs, which showby way of illustration one embodiment of the invention, l V

Figure" 1- isla plan View of a portion of a work support having a throat plate embodying my improvements;

,Fig; '2 ,is' a plan view showing certa n parts? ofjfa-"sewing machine which cooperate 'Fig; 3' is a 'sect'jonal View through the presser foot, and throat'plate, also show ng the position of the needles, the sectlon being rtakenin frontof the trimmers;

Fig, /i. is a slmilar. sectional view through the presserfoot and throat plate, the section bein'gitaken in rear of thetrinnners;

Figicfi isa similar sectional View substang tially'at-the stitching point; and

Fig.1 6' is a longitudinal sectional View through the throat plate. V v

-My, improved hroat plate is especially adapted to be used in connection with THROAT-ruin on snwme alvrnon ins;

j 7 Specification of Letters Iatent. Y N y'5 191 Applicationvfiled December 30, 19.16 Seria1 NoL- 139,824.' V

the joiningof overlapped. fabric sections: wherein the fabric sections have their: edge 7 portions upturned and directed: to-a horizontal trimming a mechanism where the edge portionsiare trimmed; and prepared; 'for-unit ing, after whichone ofthe edge portions is turned. underneath "the other, and the last named edge portion is then turned down drawings at 1, and said throat plate is adapted to be'secured to the work support 2 bysuitable screws 3, which passthrough openings inthe throat plate, The throat plate is formed with the usual feed slots which are indicated'at- 4. Said throat plate is also provided with needle openings, which are indicated at 5, '6 and 7. There is a stitch tongue between the needle openings 5 and 6, and also a stitch tongue between the needle openings'ti and I Directly in: front of the needle openings there is an inverted V.- s hap,ed rib 8 which" extends from the front end of -the throat plate longitudinally of the throat plate and terminates directly in front of the needle openings. rThis inverted V-shaped ribis cut awayas at 9,, in order tofOrm a space for the turning down of one of the trimmed dg port ns, a w l b des rib d m l 'eiiii formed with adepressed section 10jat one id hiss id b lo p rat ng ith the. I h oat P at is arrests? e dicated at 11 in th ra inge'an this p ess 'feet a a ot 12 wh ce tcnd r rwar-d' y fr m he fron ed eio fth jfiwt and term nates direct yin front of the 'ile slle len ng the Presser-feat- This slot re ters with theribSL' The fabric sections to be united are indicated in the drawings at F and F. The edge portions f and f are turned up out of the plane of the fabric sections and directed along the inclined sides of the rib 8. This rib serves to hold the sections upturned, and directs them between the trimming blades, which are indicated at 18 and 1 The trimming blades operate to trim the upturned portions. The cut away portion 9 begins just in front of the trimming point, so that the edge portion 7 after having passed the trimming blades is relieved of the support due to the rib 8 and a projecting guide on the presser foot indicated at 15 (see Fig. 4) operates to crowd this edge portion 7 down into the cut away section, while the other wall of the rib 8 serves to hold the edge portion 7" raised, and permits the turning of the edge portion f underneath the same. The rib terminates in advance of the needles, so that the sections may be brought back into the plane of the fabric sections, as indicated in Fig. 5, where the fabric sections are shown as overlapped.

The needles are indicated at 16, 17 and 18 in the drawings, and these needles are so disposed relative to the overlapped fabric sections that the center needle 17 passes through the overlapped portions, while the needle 16 enters the fabric section F only and the needle 8 enters the fabric section F only. This insures that the trimmed edges will be covered by the stitching, as well as F the fabric sections joined by the stitches which extend through the same.

The throat plate, as above noted, has a depressed portion 10, so that the surface 19 of the said depressed section is lower than the surface 20 on the other side of the rib 8 which results in the supporting of the fabric section F in a plane slightly higher than the fabric section F and facilitates the turning of the edge portion of the fabric F underneath the edge portion of the fabric sec tion F, as clearly shown in Figs. 3 and 4: of the drawings. The presser foot is formed with an enlarged portion 21 which holds the fabric on this depressed part of the throat plate.

From the above, it will be apparent that my improved throat plate includes an inverted V-shaped rib which supports the upturned edge portions of fabric sections which are to be trimmed, and this rib is cut away so as to allow one of the edge portions to be turned underneath the other after it is trimmed and before it reaches the stitchin mechanism. The throat plate is also formed with a depressed section which allows one of said fabric sections to be fed in, in a plane slightly lower than the other fabric section, and this in turn enables the fabric sections to be more readily overlapped.

The rib 8 is substantially parallel with the line of feed and is located slightly at one side of the center needle, so that although the section F of the fabric is turned up to a greater extent than the section F, whenthese upturned portions are brought back into the plane of the fabric sections they will overlap each other to a uniform extent, relative to the outer needles, and lie close to the path of travel of said outer needles.

It is obvious that minor changes in the details of construction and the. arrangement of parts may be made, without departing from the spirit of this invention, as set forth in the appended claims.

Having thus described the invention, what is claimed as new is l. A throat plate for sewing machines having needle-openings therein, and an inverted V-shaped rib located in front of said needle openings for supporting the upturned edge portions of fabric sections which are to be trimmed, said rib being cut away on one side thereof between the trimming point and the needle openings, so as to permit one of the edge portions to be turned underneath the other.

2. A throat plate for sewing machines having needle openings, an inverted V shaped rib carried by the throat plate and located in front of said needle openings for guiding the upturned edge portions of fabric sections to be trimmed, said rib being disposed in a line parallel with the line of feed, the surface of the throat plate at one side of said rib being lower than. the other to facilitate the overlapping of the upturned edges after they are trimmed.

3. A throat plate for sewing machines having needle openings, an inverted V- shaped rib carried by the throat plate and located in front of said needle openings for guiding the upturned edge portions of fabric sections to be trimmed, said rib being disposed in a line parallel with the line of feed, the surface of the throat plate at one side of said rib being lower than the other to facilitate the. overlapping of the upturned edges after they are trimmed, the center line of said rib being located at one side of the center of the needle openings, whereby the fabric sections will be overlapped substantially to the same extent at each side of the center of said needle openings.

41-. A throat plate for sewing machines having needle openings, an inverted V- shaped rib carried by the throat plate and located in front of said needle openings for guiding the upturned edge portions of fabric sections to be trimmed, said rib being disposed in a line parallel with the line of feed, the surface of said throat plate at one side of said rib being lower than the other to facilitate the overlapping of the upturned edges after they are trimmed, said rib being cut-away on the side thereof adjacent the lower surface of the throat plate and between the trimmin point and the needle openings so as to acilitate the'turning 0 the edge portion of the fabric section guided on the lower surface of the throat plate un- Gopies of this patent may be obtained for derneath the edge portion of the other fabric section. c a

In testimony whereof, I aflix my signa- 7 ture, in the presence of two Witnesses.

. JOSEPH BERGER, JR. Witnesses: v r

A. J. BAEoHLE,

ARTHUR L. WILoox.

five cents each, by addressing the Commissioner of latents,

Washington, D. 0. 

